FWIW My amp (not a Decware) is switchable between triode and pentode and has one set of 8 ohm speaker outputs. It goes from 1.8w (8 ohms) to 1.6w at 4 ohms in triode and goes from 6w (8 ohms) to 3.5w at 4 ohms in pentode.

I asked Louis about the possibility of 16 ohm drivers for his dual driver speakers and this was his answer:

"... the current set up is bit higher than 4 ohm and very easy to drive, But I'm going to look into 16 ohm coils in Alnico's."Save your small change and buy a Torii Jr, you can thank me later.